One of the problems of synthetic is the life cycle including its reliance on non-renewable fossil fuels as a raw material and for energy use. The use of synthetics continues to grow, mostly due to polyester – which currently makes up 60% of the fibres used in clothing.This has serious consequences for the climate, perpetuating the demand for fossil fuels as a raw material and using large amounts of energy for production, with polyester generating three times more CO2 emissions than cotton. One of the problems is that 80 percent used textile and shoes are disposed of from which 56 per cent finished in landfill at their end of life  and the rest are incinerated which creates harmful air emissions.
We must protect the planet and its resources for future generations. Since fossil fuels take millions of years to create, they are non-renewable. Once the resources are depleted, we will not be able to extract any more. For this reason, it is important to conserve fossil fuels by using them as sparingly as possible in important uses and finding alternative materials and sources of energy, preventing these valuable resources going to waste.Renewable resources should deliver significant reductions in greenhouse gas emissions compared to fossil-fuel based systems.
The creation of synthetic materials requires the use of large amounts of toxic chemicals. Polyesters use antimony as a catalyst. Antimony is a carcinogen, toxic to the heart, lung and liver and skin. During the Pet production process it is locked into the finished polymer and not a concern in human health, says industry. The problem is antimony is expelled with the wastewater into our rivers. (175ppm can be leached during the dying process.). Countries that can not afford technologies to remove it release antimony to open waters. When polyester is finally incinerated, it is released as a gas (antimony trioxide). And during Pet production it produces a sludge that when incinerated creates ash which contains antimony, arsenic and other metals.